Test–Retest Reliability and Concurrent Validity of an fMRI-Compatible Pneumatic Vibrator to Stimulate Muscle Proprioceptors
In conclusion, the proposed fMRI-compatible pneumatic vibrator can be used with confidence to stimulate muscle spindles during fMRI to study central processing of proprioception. (Source: Multisensory research)
Source: Multisensory research - February 19, 2016 Category: Neuroscience Authors: Nina Goossens, Lotte Janssens, Madelon Pijnenburg, Karen Caeyenberghs, Charlotte Van Rompuy, Paul Meugens, Stefan Sunaert and Simon Brumagne Source Type: research
Ponzo’s Illusion in 3D: Perspective Gradients Dominate Differences in Retinal Size
Source: Volume 29, Issue 4-5, pp 421 - 438A common form of the Ponzo illusion involves two test probes of equal size, embedded in a planar linear perspective painting depicting a three-dimensional (3D) scene, where the probe perceived to be farther is judged to be larger than the probe perceived closer to the viewer. In this paper, the same perspective 3D scene was painted on three surfaces: (a) A 2D surface incongruent with the 3D painted scene (flat perspective). (b) A 3D surface with a geometry congruent with the 3D scene (proper perspective). (c) A 3D surface with an opposite depth arrangement to the 3D scene (reverse ...
Source: Multisensory research - February 19, 2016 Category: Neuroscience Authors: Joshua J. Dobias, Thomas V. Papathomas and Anuja Sarwate Source Type: research
Visual-Somatosensory Integration in Older Adults: Links to Sensory Functioning
Source: Volume 29, Issue 4-5, pp 397 - 420Research investigating multisensory integration (MSI) processes in aging is scarce, but converging evidence for larger behavioral MSI effects in older compared to younger adults exists. The current study employed a three-prong approach to determine whether inherent age-related sensory processing declines were associated with larger (i.e., worse) visual-somatosensory (VS) reaction time (RT) facilitation effects. Non-demented older adults ( n = 156 ; mean age = 77 years; 55% female) without any medical or psychiatric c...
Source: Multisensory research - February 19, 2016 Category: Neuroscience Authors: Kristina Dumas, Roee Holtzer and Jeannette R. Mahoney Source Type: research
Audiovisual Integration of Time-to-Contact Information for Approaching Objects
Source: Volume 29, Issue 4-5, pp 365 - 395Previous studies of time-to-collision (TTC) judgments of approaching objects focused on effectiveness of visual TTC information in the optical expansion pattern (e.g., visual tau, disparity). Fewer studies examined effectiveness of auditory TTC information in the pattern of increasing intensity (auditory tau), or measured integration of auditory and visual TTC information. Here, participants judged TTC of an approaching object presented in the visual or auditory modality, or both concurrently. TTC information provided by the modalities was jittered slightly against each other, so t...
Source: Multisensory research - February 19, 2016 Category: Neuroscience Authors: Patricia R. DeLucia, Doug Preddy and Daniel Oberfeld Source Type: research
Cross-Modal Correspondences Enhance Performance on a Colour-to-Sound Sensory Substitution Device
This study introduces a new tablet-based SSD termed the ‘Creole’ (so called because it combines tactile scanning with image sonification) and a new algorithm for converting colour to sound that is based on established cross-modal correspondences (intuitive mappings between different sensory dimensions). To test the utility of correspondences, we examined the colour–sound associative memory and object recognition abilities of sighted users who had their device either coded in line with or opposite to sound–colour correspondences. Improved colour memory and reduced colour-errors were made by users who had the corresp...
Source: Multisensory research - February 19, 2016 Category: Neuroscience Authors: Giles Hamilton-Fletcher, Thomas D. Wright and Jamie Ward Source Type: research
Sounds Modulate the Perceived Duration of Visual Stimuli Crossmodal Integration
In this study, we examine whether sounds presented separately from target visual stimuli alter the perceived duration of the target’s presentation. The participants’ task was to classify the duration of the target visual stimuli as perceived by them into four categories. Our results demonstrate that a sound presented before and after a visual target increases or decreases the perceived visual duration depending on the inter-stimulus interval between the sounds and the visual stimulus. In addition, three tones presented before and after a visual target did not increase or decrease the perceived visual duration. This ind...
Source: Multisensory research - February 19, 2016 Category: Neuroscience Authors: Riku Asaoka and Jiro Gyoba Source Type: research
Depth: the Forgotten Dimension in Multisensory Research (Advance Article)
Source: Page Count 32The last quarter of a century has seen a dramatic rise of interest in the spatial constraints on multisensory integration. However, until recently, the majority of this research has investigated integration in the space directly in front of the observer. The space around us, however, extends in three spatial dimensions in the front and to the rear beyond such a limited area. The question to be addressed in this review concerns whether multisensory integration operates according to the same rules throughout the whole of three-dimensional space. The results reviewed here not only show that the space arou...
Source: Multisensory research - January 21, 2016 Category: Neuroscience Authors: N. van der Stoep, A. Serino, A. Farnè, M. Di Luca and C. Spence Source Type: research
Downward and Parallel Perspectives in an Experimental Study of Out-of-Body Experiences
Source: Page Count 13Out-of-body experiences (OBEs) have been reported in patients with neurological or psychiatric disorders. According to these reports, the patients looked down on their body from overhead. Based on this phenomenon, we adopted a downward perspective in an experimentally induced OBE paradigm and compared responses to an OBE questionnaire (sensations of OBE) with self-location mapping (feelings of body drift). The results revealed a correlation between the sensation of an OBE and self-location under the downward-perspective condition but not under the parallel-perspective condition; however, no significant...
Source: Multisensory research - January 21, 2016 Category: Neuroscience Authors: Kentaro Hiromitsu and Akira Midorikawa Source Type: research
Disambiguating the Stream/Bounce Illusion With Inference
Source: Page Count 12The ‘stream/bounce’ illusion refers to the perception of an ambiguous visual display in which two discs approach each other on a collision course. The display can be seen as two discs streaming through each other or bouncing off each other. Which perception dominates, may be influenced by a brief transient, usually a sound, presented around the time of simulated contact. Several theories have been proposed to account for the switching in dominance based on sensory processing, attention and cognitive inference, but a universally applicable, parsimonious explanation has not emerged. We hypothesized t...
Source: Multisensory research - January 15, 2016 Category: Neuroscience Authors: Philip M. Grove, Caitlin Robertson and Laurence R. Harris Source Type: research
Ponzo’s Illusion in 3D: Perspective Gradients Dominate Differences in Retinal Size (Advance Article)
Source: Page Count 18A common form of the Ponzo illusion involves two test probes of equal size, embedded in a planar linear perspective painting depicting a three-dimensional (3D) scene, where the probe perceived to be farther is judged to be larger than the probe perceived closer to the viewer. In this paper, the same perspective 3D scene was painted on three surfaces: (a) A 2D surface incongruent with the 3D painted scene (flat perspective). (b) A 3D surface with a geometry congruent with the 3D scene (proper perspective). (c) A 3D surface with an opposite depth arrangement to the 3D scene (reverse perspective). This la...
Source: Multisensory research - December 23, 2015 Category: Neuroscience Authors: Joshua J. Dobias, Thomas V. Papathomas and Anuja Sarwate Source Type: research
Audiovisual Integration of Time-to-Contact Information for Approaching Objects (Advance Article)
Source: Page Count 31Previous studies of time-to-collision (TTC) judgments of approaching objects focused on effectiveness of visual TTC information in the optical expansion pattern (e.g., visual tau, disparity). Fewer studies examined effectiveness of auditory TTC information in the pattern of increasing intensity (auditory tau), or measured integration of auditory and visual TTC information. Here, participants judged TTC of an approaching object presented in the visual or auditory modality, or both concurrently. TTC information provided by the modalities was jittered slightly against each other, so that auditory and visu...
Source: Multisensory research - December 3, 2015 Category: Neuroscience Authors: Patricia R. DeLucia, Doug Preddy and Daniel Oberfeld Source Type: research
Sounds Modulate the Perceived Duration of Visual Stimuli Crossmodal Integration (Advance Article)
In this study, we examine whether sounds presented separately from target visual stimuli alter the perceived duration of the target’s presentation. The participants’ task was to classify the duration of the target visual stimuli as perceived by them into four categories. Our results demonstrate that a sound presented before and after a visual target increases or decreases the perceived visual duration depending on the inter-stimulus interval between the sounds and the visual stimulus. In addition, three tones presented before and after a visual target did not increase or decrease the perceived visual duration. This ind...
Source: Multisensory research - December 1, 2015 Category: Neuroscience Authors: Riku Asaoka and Jiro Gyoba Source Type: research
Cross-Modal Correspondences Enhance Performance on a Colour-to-Sound Sensory Substitution Device (Advance Article)
This study introduces a new tablet-based SSD termed the ‘Creole’ (so called because it combines tactile scanning with image sonification) and a new algorithm for converting colour to sound that is based on established cross-modal correspondences (intuitive mappings between different sensory dimensions). To test the utility of correspondences, we examined the colour–sound associative memory and object recognition abilities of sighted users who had their device either coded in line with or opposite to sound–colour correspondences. Improved colour memory and reduced colour-errors were made by users who had the corresp...
Source: Multisensory research - December 1, 2015 Category: Neuroscience Authors: Giles Hamilton-Fletcher, Thomas D. Wright and Jamie Ward Source Type: research
Visual-Somatosensory Integration in Older Adults: Links to Sensory Functioning (Advance Article)
Source: Page Count 24Research investigating multisensory integration (MSI) processes in aging is scarce, but converging evidence for larger behavioral MSI effects in older compared to younger adults exists. The current study employed a three-prong approach to determine whether inherent age-related sensory processing declines were associated with larger (i.e., worse) visual-somatosensory (VS) reaction time (RT) facilitation effects. Non-demented older adults ( n = 156 ; mean age = 77 years; 55% female) without any medical or psychiatric conditions were includ...
Source: Multisensory research - November 24, 2015 Category: Neuroscience Authors: Kristina Dumas, Roee Holtzer and Jeannette R. Mahoney Source Type: research
Haptic and Tactile Adjectives Are Consistently Mapped onto Color Space
In this study, participants were asked to match tactile and haptic adjectives to color samples shown individually on a screen. They could select one to 11 tactile and haptic terms, presented in 11 pairs of opposed adjectives. The results showed a regular pattern in the way tactile and haptic terms were matched to color. Our results further revealed that the colors to which tactile and haptic terms were matched did not fall within the boundaries of color lexical categories, suggesting that the associations were not based on lexicon — despite the frequent occurrence of linguistic expressions such as ‘soft pink’, not a...
Source: Multisensory research - November 2, 2015 Category: Neuroscience Authors: Yasmina Jraissati, Nadiya Slobodenyuk, Ali Kanso, Lama Ghanem and Imad Elhajj Source Type: research
